Track background activityAs soon as your computer connects to the Internet, applications often have permission to send any information wherever they need to. Little Snitch takes note of this activity and allows you to decide for yourself what happens with this data.

Control your networkChoose to allow or deny connections, or define a rule how to handle similar, future connection attempts. Little Snitch runs inconspicuously in the background and it can even detect network-related activity of viruses,More...

What's New

Version 4.0.1:

Note: Now requires OS X 10.11 or later. Note: Version 4 is a paid upgrade from previous versions.

General Improvements

Improved TouchBar support

Improved handling of FTP connections

Improved upgrade from version 3 to preserve an active Silent Deny Mode

Track background activityAs soon as your computer connects to the Internet, applications often have permission to send any information wherever they need to. Little Snitch takes note of this activity and allows you to decide for yourself what happens with this data.

Control your networkChoose to allow or deny connections, or define a rule how to handle similar, future connection attempts. Little Snitch runs inconspicuously in the background and it can even detect network-related activity of viruses, trojans, and other malware.

Version 4.0.1:

Note: Now requires OS X 10.11 or later. Note: Version 4 is a paid upgrade from previous versions.

General Improvements

Improved TouchBar support

Improved handling of FTP connections

Improved upgrade from version 3 to preserve an active Silent Deny Mode

Domains and search-domains that are explicitly configured in macOS System Preferences > Network Preferences > Advanced > DNS are now considered

Fixed some spelling errors, improved wording and localization

Fixed a crash of Little Snitch Agent when turning off the Network Monitor while Silent Mode was active

Fixed an issue when creating a new rule or profile in Little Snitch Configuration while the Known Networks window was open

Fixed a possible kernel panic

Many minor bug fixes

Connection Alert

The connection alert now shows a warning when the connecting application is affected by Gatekeeper Path Randomization (which indicates that the app was not correctly installed)

The alert now also shows a plain text representation of internationalized domain names containing special characters which require encoding; this makes it possible to identify homograph domain name attacks

The connection alert now allows to create rules for an entire Content Delivery Network domain

Fixed the ordering of minimized alerts: When maximizing the alert, the last minimized alert is opened first

Menu-Bar Icon

Improved indication of active silent mode in menu bar

The menu bar icon is now always shown while "Silent Mode - Deny Connections" is active, regardless of the "Show status in menu bar" preference option

Network Monitor

Added preferences option to show the Network Monitor when the mouse hovers the menu bar icon

Added "Help" menu item

Improved Top Countries summary statistics in Connection Inspector

Fixed a bug where Network Monitor became unresponsive when Little Snitch Daemon crashed

Fixed an issue causing Network Monitor to start with an empty list instead of showing the stored previous connections

It goes without saying that Little Snitch is a masterpiece in software engineering and years of intense use has proven this to me. It functions unobtrusively in the background and shows up only when an application begins to behave in an unorthodox way like phoning home or sending out information it’s not supposed to do. You then decide to grant permission or deny the entire process or only the one on a specific port. It’s been regularly updated to keep it compatible with the latest Mac OS changes so that its efficiency is never compromised. If you care about your sensitive data e do not wish it to be extracted from your Mac in any imaginable way then you owe it to yourself to give Little Snitch a try. Fariborz AMIRSHAHI - Verona (Italy)